I tried this a couple times and really couldn't tell the difference. More of a waste of $$$ either go for the real thing as in bottles and timer so you get a more. I have seen CO2 tablets for sale but have never tried them.
MrLzyBones Reviewed by MrLzyBones on . dryice w/ growing to add CO2 im going to be growing in a near air tight room and im worried about air quality and i was wondering if anybody else has ever tried having dryice with their plants as it would breathe pure CO2 to them. i havent seen anything about this so lemme know what yall think. Rating: 5